Improvement in blacksmiths  bellows



'tlnttul ga/tutte @tutti JOHN- F. CORY AND HENRY O. WEBB, OF BROOKLYN, E.' D., NEW YORK.

Letters Patent No. 103,720, dated .lfay 3l, 1870.

IMPROVEMENT IN BLAeKsMITHs" BELLoWs.

The Schedule referred to in these Letters Patent and making part. of the same.

ToA all whom it may concern.- Be it known that we, Joris F. Comand HENRY O.

WEBB, of Brooklyn, E. D., in the county of Kings and;

State of New York, haveinvented a new and useful Improvement in Blacksmiths7 Bellows; and we do hereby declare the following to be a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference-l being had to the accompanying drawing forming part of this specification, in which drawing- Figure 1 is an elevation of this invention.

Figure 2 is a vertical section ot` the same.

Similar-letters indicate corresponding parts.

This invention relates to bellows 'for forges; and

, It consists, among other things, in Aan arrangement of compensating spring stops or weights, which are brought down andV made to bear on the top of the reservoir or air-chest at the times when the pumplevers are making t-heir return strokes, so as to keep up a steady blast at all periods of the working of the pumps.

It also consists in a counterpoise attached to the axis of the lever by which the bellows is operated,.so that the return movement of the lever is facilitated, and the labor of the attendant lessened also, in the arrangement of detlectors within theair-chest or reservoir, for the purpose of deiiecting the currents of air and preventing them from-going directly from the inlet-valves' to the place or places of discharge; also, in a novel arrangement of lovers whereby the bellows is operated; also, in arranging the bellows-boards upon shafts, on which' they operate, instead of hinging them, as is now done.

In the drawing- The' letter A designat a box or case, which contains the apparatus and furnishes hearings for the levers by whichit is operated. p The letter' B designates an air-chest or reservoir, which risesthrough the top of the box,V and which is provided with flexible sides, so that it can `fold down toward the box when the supply of air falls olf, and it has a solid top, G, which receives the pressure of thev spring stops D, hereinafter described.

'lh'eair-chest is supplied with air by means of two independent pumps or bellows, E E, arranged on the bottom F ofthe air-chest, inside ot' the box A, and having flexible sides and valves for receiving and discharging air into the air-chest., as usual.

The'valves G G, through which the air enters the air-chest from the pumps, are provided with detiectors H H, by means ot' which we prevent the. currents of air from going directly from the valve-openings to t-he nozzle I.

When no such deector is used, the air, as it enters the` air-chest, rushes from the valve to the nozzle, and

produces a varying and irregular blast, but, by means of our detiectors, we cause the air, as it enters, tol pass int-o the remoter parts oi the airchest, and we obtain 'a greater compression of air, whereby a more regular and uniform blast is maintained than is had `by the old method of construction. K 5 le arrange the deectors in any convenient inannerso as to interpose them between the valves"and the nozzle or nozzles, and compel the air Ito pass-first into those parts ot' the air-chest which are remote from the nozzle.'y

Over the top ot' the air-chest wc arrange spring stops or weights, D D, one for each pump or bellows, which stops are attached to and move with the pumplever or cross-beam L, in suoli a mannerthat the springs o r weights come into operation at the end of each stroke alternately, or when the actuating-leverk is up or down, and when one pump is full and the other is empty, and, at the moment of rest, when neither pump is blowing, the moment the lever K is moved, on thelturn to ascend or descend, the pressure or weight is taken ott 'lhe object of this is to pnt a greater pressure ou the air-chest or chamber at the exact time when there is no air being discharged from the pumps, thereby compressing the air in the aix chamber from above, and compensating foi the loss' ofthe pressure of the pumps from below, and producing a steady and continuous blast.

rlhe spring stops D D are attached to the arms of the cross-beam, at such distances from its center ot' motion as is necessary to insure their action on the The spring bars, which extend from the cross-beam above or over the air-chest. u

lVe do not confine ourselves to the arrangement of spring stops here shown, but we claim the right to modify the same in any manner, so long as they derive their motion from the return-stroke ot the pumps or bellows; neither do we confine ourselves to spring stops or arms, as we can use weights for the same purpose. 'lhis feature ot' our invention assists, in an y,important degree, in maintaining a steady, uniform blast.

The apparatus is operated through a lever, K, fastened to the fnlcrum of across-beam` L.

The counterpoise weight O is'ixed, by means of the arm N, on the center ot' the lever or cross-beam L, so

that, at the end of the first stroke, it will bring one of the bellows-boards l down, and, by its momentum, swing beyond the center, and assist the opposite board P to rise, which, in turn, it will also helpto descend, and vice versa, thereby making the stroke of the bellows uniform, and assisting the operation by means of its. momentum.

The ends of the cross-beam L are connected, by the rods Q, Q, to crank-arms R R, which are flxed, respectively, nponthe shafts or centers J J, upon which the bellows-boards P I turn, and these connections are made adjustable by means of holes in the crankarrns R and in the cross-beam L, which holes are arranged so that the length of the stroke at the end of the lever K may be shortened or lengthened, 'to snit tall or short men or boys, without losing power.

In operating our apparat-us, the power is applied by hand or otherwise to the cross-beam L, and, by its vibration. the pumps or bellows E E are worked in alter-nation, independently of each other, and the airchest is constantly' supplied with air.

The bellows or pump-boards are mounted upon shafts or axes J J about which they turn, and upon the ends of said shafts we fix the cranks R, by which the bellows or pumps are operated.

The object of fixing the bellows-boards on shafts is, first, to avoid the use of leather hinges, which are'con-Y stantly Wearing out from 'the shortness ot' the bend; and, secondly, to discharge the wholecontents of each chamber at each stroke, by working from a fixed eenter, thereby preventing theoscillating motion or. blow ing down 7 at the hinge, asin other bellows.

What we claim as new, and desire to secure by Letters Patent, is-

1. The combination, with the airfchest B of a blacksmiths bellows, of stops D, applied and operating substantially as described.

2. The connterpoise O, in combination with the cross-beam L and pumps or bellows .E E, substantial] y as described.

3. lhe detlector H, in combination with the inlet# valves ofthe air-chest, when arranged relatively with the nozzle I, substantially as and for the purpose described.

4. The arrangement and combination, in a blacksmiths bellows, of the lever K, cross-beam L, counterpoise arm `.and weight N O, rods Q, and cranlnarlns R, with the shafts J J of the independent pumps or bellows EE, substantially as described. p

This specification signed by ns this 25th day ot' April, 1370.

JOHN F. CORY. HENRY C'. \\-'-EBB.

Witnesses:

W. HAUFF, C. WAHnnns. 

